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<h1 class="topictitle1">Creating a File Name Extension Filtering Rule</h1>
<div><p>Known ransomware file name extensions to be intercepted are preset in the system. You can refer to this section to add file name extensions.</p>
<div class="section"><h4 class="sectiontitle">Procedure</h4><ol><li><span>On the navigation pane, choose <strong>Data Security</strong> &gt; <strong>Ransomware Protection</strong> &gt; <strong>File Interception</strong>.</span></li><li><span>Click <span class="uicontrol"><b>Create</b></span>.</span><p><p>The <strong>Create File Name Extension Filtering Rule</strong> dialog box is displayed.</p>
<p><span><img src="en-us_image_0000002079002621.png" width="387.03000000000003" height="129.389981"></span></p>
<p></p>
</p></li><li><span>Set parameters of the file name extension filtering rule.</span><p><p><a href="#EN-US_TOPIC_0000002042963184__table373910544193">Table 1</a> describes the related parameters.</p>

<div class="tablenoborder"><a name="EN-US_TOPIC_0000002042963184__table373910544193"></a><a name="table373910544193"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000002042963184__table373910544193" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Parameters of the file name extension filtering rule</caption><colgroup><col style="width:22.1%"><col style="width:77.9%"></colgroup><thead align="left"><tr><th align="left" class="cellrowborder" valign="top" width="22.1%" id="mcps1.3.2.2.3.2.2.2.3.1.1"><p>Parameter</p>
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<th align="left" class="cellrowborder" valign="top" width="77.9%" id="mcps1.3.2.2.3.2.2.2.3.1.2"><p>Description</p>
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<tbody><tr><td class="cellrowborder" valign="top" width="22.1%" headers="mcps1.3.2.2.3.2.2.2.3.1.1 "><p>File Name Extensions to Be Intercepted</p>
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<td class="cellrowborder" valign="top" width="77.9%" headers="mcps1.3.2.2.3.2.2.2.3.1.2 "><p>File name extensions to be intercepted. You can enter one or more file name extensions.</p>
<p>[Value range]</p>
<ul><li>The value contains 1 to 127 characters.</li><li>A file name extension can contain only digits, letters, spaces, and special characters (!"#$%&amp;'()*+,-./:;&lt;=&gt;?@[\]^_`{|}~). Wildcards <strong>?</strong> and <strong>*</strong> are supported, and wildcard <strong>*</strong> must be the last character. For example, <strong>T?X</strong> or <strong>Tx*</strong>.</li><li>Multiple file name extensions are separated by commas (,).<p>[Example]</p>
<p>txt,docx,xlsx</p>
</li></ul>
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<tr><td class="cellrowborder" valign="top" width="22.1%" headers="mcps1.3.2.2.3.2.2.2.3.1.1 "><p>Associate with vStore</p>
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<td class="cellrowborder" valign="top" width="77.9%" headers="mcps1.3.2.2.3.2.2.2.3.1.2 "><p>Indicates whether to associate with vStores.</p>
<ul><li>Disabled: The file name extension filtering rule is created but is not associated with any vStore.</li><li>Enabled: The file name extension filtering rule is created and vStores to be associated are selected from the vStore list.</li></ul>
<div class="note"><span class="notetitle"> NOTE: </span><div class="notebody"><p>The preset file name extension filtering rules are associated with all vStores in the system by default.</p>
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</p></li><li><span>Click <span class="uicontrol"><b>OK</b></span>.</span></li></ol>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000002042963220.html">Configuring a File Name Extension Filtering Rule</a></div>
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